Because it's Friday: A pie chart that's actually interesting

I have no idea who created this (Google Image Search just yields a bunch of unattributed Tumblrs) but it's cool:

By my eye, it looks like each dot travels along each diameter on a sinusoidal projection, and I guess it wouldn't be hard to prove that by offsetting each wave by 45 degrees you'd end up with a circle. Still, I'm not going to try, and instead just enjoy the animation. Woo.

That's all for this week — have a great weekend!

Comments

[Jorge]

Hi, you can see more about this effect here: http://illusionoftheyear.com/2013/tusi-or-not-tusi/

Arthur Shapiro won the second price with this illusion at the Best Illusion of the Year contest 2013.

[David Smith]

Thanks for the link, Jorge! For others reading, do check out this Illusion of the Year and be sure to click the two blue buttons under the animation. It's the same animation each time (dots travelling along a line), just different synchronizations of the dot positions. Very cool!